import threading
import time


print('case01')
num=0  #全局变量多个线程可以读写，传递数据
mutex=threading.Lock() #创建一个锁

class Mythread(threading.Thread):
    def run(self):
        global num
        # with mutex:   #with Lock的作用相当于自动获取和释放锁(资源)
        #     for _ in range(1000000): #锁定期间，其他线程不可以干活
        #         num+=1
        # print(num)
        if mutex.acquire(1):
            for _ in range(1000000):
                num += 1
        mutex.release()
        print(num)

mythread=[]
for i  in range(5):
    t=Mythread()
    t.start()
    mythread.append(t)
for t in mythread:
    t.join()
print("game over")
print('-----------')
print('case02')
#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
import threading
import time
 
exitFlag = 0
 
class myThread2 (threading.Thread):   #继承父类threading.Thread
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
    def run(self):                   #把要执行的代码写到run函数里面 线程在创建后会直接运行run函数 
        print("Starting " + self.name)
        print_time(self.name, self.counter, 5)
        print("Exiting " + self.name)
 
def print_time(threadName, delay, counter):
    while counter:
        if exitFlag:
            (threading.Thread).exit()
        time.sleep(delay)
        print("%s: %s cnt: %d" % (threadName, time.ctime(time.time()), counter))
        counter -= 1
 
# 创建新线程
thread1 = myThread2(1, "Thread-1", 1)
thread2 = myThread2(2, "Thread-2", 2)
 
# 开启线程
thread1.start()
thread2.start()
thread1.join()
thread2.join()
 
print("Exiting Main Thread")
print('-----------')
print('case03')

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
import threading
import time
 
class myThread3 (threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
    def run(self):
        print("Starting " + self.name)
       # 获得锁，成功获得锁定后返回True
       # 可选的timeout参数不填时将一直阻塞直到获得锁定
       # 否则超时后将返回False
        threadLock.acquire()
        print_time(self.name, self.counter, 3)
        # 释放锁
        threadLock.release()
 
def print_time(threadName, delay, counter):
    while counter:
        time.sleep(delay)
        print("%s: %s" % (threadName, time.ctime(time.time())))
        counter -= 1
 
threadLock = threading.Lock()
threads = []
 
# 创建新线程
thread1 = myThread3(1, "Thread-1", 1)
thread2 = myThread3(2, "Thread-2", 2)
 
# 开启新线程
thread1.start()
thread2.start()
 
# 添加线程到线程列表
threads.append(thread1)
threads.append(thread2)
 
# 等待所有线程完成
for t in threads:
    t.join()
print("Exiting Main Thread")

print('-----------')
print('case04')
#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
import queue
import threading
import time
 
exitFlag = 0
 
class myThread4 (threading.Thread):
    def __init__(self, threadID, name, q):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.q = q
    def run(self):
        print( "Starting " + self.name)
        process_data(self.name, self.q)
        print( "Exiting " + self.name)
 
def process_data(threadName, q):
    while not exitFlag:
        queueLock.acquire()
        if not workQueue.empty():
            data = q.get()
            queueLock.release()
            print( "%s processing %s" % (threadName, data))
        else:
            queueLock.release()
        time.sleep(1)
 
threadList = ["Thread-1", "Thread-2", "Thread-3"]
nameList = ["One", "Two", "Three", "Four", "Five"]
queueLock = threading.Lock()
workQueue = queue.Queue(10)
threads = []
threadID = 1
 
# 创建新线程
for tName in threadList:
    thread = myThread4(threadID, tName, workQueue)
    thread.start()
    threads.append(thread)
    threadID += 1
 
# 填充队列
queueLock.acquire()
for word in nameList:
    workQueue.put(word)
queueLock.release()
 
# 等待队列清空
while not workQueue.empty():
    pass
 
# 通知线程是时候退出
exitFlag = 1
 
# 等待所有线程完成
for t in threads:
    t.join()
print("Exiting Main Thread")